Question : Comprehension: In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank. Data 1._______ the Pioneer spacecraft of NASA apparently prove the theory that the high surface temperature of Venus is 2.______ to an atmospheric greenhouse effect caused mainly by a blanket of carbon dioxide. Such a greenhouse 3.______ is created when energy in the form of sunlight easily passes through a planet's atmosphere, warms its 4.____ and is converted to heat radiation that is then held in by the atmosphere from top to bottom. Venus has a relatively thin atmosphere like the Earth's, but Venus' atmosphere consists of more than ninety percent carbon dioxide, compared to less than four percent in that of the 5.____ Select the most appropriate option to fill in the blank No. 4.
Option 1: atmosphere
Option 2: walls
Option 3: core
Option 4: surface
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Correct Answer: surface
Solution : The fourth option is correct.
In the given context, the word surface would be used because it refers to the outermost layer or topmost part of the planet. When energy in the form of sunlight passes through a planet's atmosphere, it eventually reaches the surface.
The meanings of other words:
Hence, the complete sentence would be, "A planet's atmosphere warms its surface and is converted to heat radiation".
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Question : Comprehension: In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank. Data 1._______ the Pioneer spacecraft of NASA apparently prove the
Question : Comprehension: In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.
Human activities are changing Earth's natural greenhouse 1.
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